echo

Updated 远程教学之流程消息 (markdown)

... ... @@ -84,4 +84,12 @@ fc5545a9a728904dc533efcbfff1d2c5,
"type":"flow",
"command":"endCourse"
}
```
\ No newline at end of file
```
### 错误处理
### 教师端掉线
to do
#### 学生端掉线
to do
\ No newline at end of file
... ...